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Laboratory Analyses for MTP, MMF, DFSA, and PPF Acid June 18, 2019

LC/MS/MS Method Performance for DFSA

This technical memorandum addresses questions regarding observed variability in the determination of DFSA (difluorosulfoacetic acid) by Eurofins TestAmerica’s current LC/MS/MS methodology, known as the ‘Table 3+’ analytical method.

Provision of Sampling Results Pursuant to Consent Order Paragraph 22 March 7, 2019

As you know, this past Monday, March 4th, pursuant to Consent Order Paragraph 22, we provided DEQ with results from residential well sampling conducted prior to the entry of the Consent Order (and those results had already been shared with the respective residents).

Consent Order Paragraph 23 Notification June 10, 2019

This letter is to notify the Department that in accordance with Paragraph 23 of the Consent Order, Chemours is discontinuing delivery of bottled water to those residences where a GAC system has been installed and sampling has confirmed the effectiveness of that GAC system.

ENGINEERING REPORT OLD OUTFALL 002 GAC PILOT STUDY RESULTS

CHEMOURS FAYETTEVILLE PLANT FAYETTEVILLE, NORTH CAROLINA

CFR Long-Term Remedy Performance Monitoring Report #4 October – December 2023

This CFR Long-Term Remedy Performance Monitoring Report #4 (“Report”) has been prepared for the Q4 2023 period of October 1 through December 31, 2023 and documents the operation of the interim seep Flow-Through Cells (FTCs), the ex-situ seeps and weeps capture systems (“Ex- Situ Capture Systems”), the groundwater extraction and conveyance system (GWEC), and the groundwater treatment plant (GWTP).

Chemours’ Thermal Oxidizer Destroying PFAS at Greater Than 99.99% Efficiency

The Chemours Company (Chemours) (NYSE: CC), a global chemistry company with leading market positions in titanium technologies, fluoroproducts and chemical solutions, has announced that testing of its Fayetteville Works thermal oxidizer has demonstrated a 99.99% PFAS destruction efficiency.

Appendix A Cape Fear River PFAS Mass Loading Model

The objective of this appendix is to estimate the mass discharge from the identified PFAS transport pathways using a Cape Fear River mass loading model developed and described in the Cape Fear River Mass Loading Calculation Protocol Version 2 (Geosyntec, 2020a) and to assess contributions by pathway.

Consent Order Progress Report For Fourth Quarter 2019

Submissions to the State of North Carolina and Cape Fear River Watch

Consent Order Progress Report For Third Quarter 2019

Submissions to the State of North Carolina and Cape Fear River Watch